Organ (anatomy)
In biology, an organ ( Latin: organum, "instrument, tool") is a group of tissues that perform a specific function or group of functions. Common animal organs include the heart, lungs, brain, eye, stomach, spleen, pancreas, kidneys, liver, intestines, skin, uterus, bladder, bone, etc. A group of related organs is an organ system.
Organelles are analogous sub- cellular structures.
Organ systems
Organ system – a system composed of organs working together to carry out a function.
- Circulatory system
- Digestive system
- Endocrine system
- Integumentary system
- Lymphatic system
- Muscular system
- Nervous system
- Reproductive system
- Respiratory system
- Skeletal system
- Urinary system